#include <Arduino.h>

int ledRpin = 6;
int ledGpin = 5;
int ledBpin = 3;

void setup() {
  Serial.begin(9600);
  pinMode(ledRpin, OUTPUT);
  pinMode(ledGpin, OUTPUT);
  pinMode(ledBpin, OUTPUT);
}

void loop() {
while(1){
  breathR();
  breathG();
  breathB();
}

}

void breathR(){
  int brightR = 0;
  for(brightR; brightR < 255; brightR+=5){
  analogWrite(ledRpin, brightR);
  analogWrite(ledGpin, 0);
  analogWrite(ledBpin, 0);
  Serial.print("红灯亮度为");
  Serial.println(brightR);
  delay(10);
  }
  for(brightR; brightR > 0; brightR-=5){
  analogWrite(ledRpin, brightR);
  analogWrite(ledGpin, 0);
  analogWrite(ledBpin, 0);
  Serial.print("红灯亮度为");
  Serial.println(brightR);
  delay(10);
  }
}

void breathG(){
  int brightG = 0;
  for(brightG; brightG < 255; brightG+=5){
  analogWrite(ledRpin, 0);
  analogWrite(ledGpin, brightG);
  analogWrite(ledBpin, 0);
  Serial.print("绿灯亮度为");
  Serial.println(brightG);
  delay(10);
  }
  for(brightG; brightG > 0; brightG-=5){
  analogWrite(ledRpin, 0);
  analogWrite(ledGpin, brightG);
  analogWrite(ledBpin, 0);
  Serial.print("绿灯亮度为");
  Serial.println(brightG);
  delay(10);
  }
}

void breathB(){
  int brightB = 0;
  for(brightB; brightB < 255; brightB+=5){
  analogWrite(ledRpin, 0);
  analogWrite(ledGpin, 0);
  analogWrite(ledBpin, brightB);
  Serial.print("蓝灯亮度为");
  Serial.println(brightB);
  delay(10);
  }
  for(brightB; brightB > 0; brightB-=5){
  analogWrite(ledRpin, 0);
  analogWrite(ledGpin, 0);
  analogWrite(ledBpin, brightB);
  Serial.print("蓝灯亮度为");
  Serial.println(brightB);
  delay(10);
  }
}